
having initial condition \(x(0)=(s(0), i(0), i_E(0), w(0))\) . (The vector \(x(t)\)  is not in bold to help link with the theory in [1]}, where \(x(t)\)  has a separate meaning, that is used in the proofs.) Let \(\bar{X}^{(n)}(t)=n^{-1}X^{(n)}(t)\) .
